Evaporation and Degradation of VX on Silica Sand
| Autor: | Bruce E. King, Robert G. Nickol, Carol A. S. Brevett, John J. Pence, Kenneth B. Sumpter, H. Dupont Durst, Chris V. Giannaras |
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| Rok vydání: | 2009 |
| Předmět: |
Borosilicate glass
Evaporation Protonation Surfaces Coatings and Films Electronic Optical and Magnetic Materials Catalysis Autocatalysis chemistry.chemical_compound General Energy chemistry Magic angle spinning Organic chemistry Degradation (geology) Physical and Theoretical Chemistry EMPA Nuclear chemistry |
| Zdroj: | The Journal of Physical Chemistry C. 113:6622-6633 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp8111099 |
| Popis: | The evaporation and degradation of VX (O-ethyl S-[2-N,N-(diisopropylamino)ethyl] methylphosphonothioate) on silica sand and borosilicate glass were measured using vapor analysis and 31P solid state magic angle spinning nuclear magnetic resonance (SSMAS NMR) spectroscopy. 31P SSMAS NMR studies of VX degradation on crushed glass, air-dried sand, and oven-dried sand at a variety of temperatures showed that the final product was nontoxic ethyl methylphosphonic acid (EMPA), produced via the toxic diethyl dimethylpyrophosphonate intermediate. The reaction exhibited a lag time that depended upon the quantity of water and EMPA that were present in the initial sample of VX and was autocatalytic; EMPA was both the catalyst and product for the degradation of VX. 31P SSMAS NMR studies of VX on moist sand at a variety of temperatures showed that the final product was nontoxic EMPA; observed intermediates were protonated VX, O-ethyl methylphosphonothioic acid, and toxic EA-2192 (S-[2-N,N-(diisopropylamino)ethyl methylp... |
| Databáze: | OpenAIRE |
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